package com.mroapp.zxing.view;

import android.content.Context;
import android.graphics.Bitmap;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import java.util.Hashtable;

public class CreateOrCodeActivity {
	/** 
     * 用字符串生成二维码 
     * @param str 
     * @author karl 
     * @return 
     * @throws WriterException 
     */  
    public static Bitmap Create2DCode(String str,Context context,int w,int h) throws WriterException {  
    	// 用于设置QR二维码参数
		Hashtable<EncodeHintType, Object> qrParam = new Hashtable<EncodeHintType, Object>();
		// 设置QR二维码的纠错级别——这里选择最高H级别
		qrParam.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
		// 设置编码方式
		qrParam.put(EncodeHintType.CHARACTER_SET, "UTF-8");

        //生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败  
        BitMatrix matrix = new MultiFormatWriter().encode(str,BarcodeFormat.QR_CODE, w, h,qrParam);  

        int width = matrix.getWidth();  
        int height = matrix.getHeight();  
        //二维矩阵转为一维像素数组,也就是一直横着排了  
        int[] pixels = new int[width * height];  
        for (int y = 0; y < height; y++) {  
            for (int x = 0; x < width; x++) {  
                if(matrix.get(x, y)){  
                    pixels[y * width + x] = 0xff000000;  
                } else {
                    pixels[y * width + x] = 0xffffffff;
                }

                  
            }  
        }  
          
        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);  
        //通过像素数组生成bitmap,具体参考api  
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);  
        return bitmap;  
    }  
}
